• 한국식품영양과학회지
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• 제34권8호
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• pp.1195-1201
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• 2005

한국인의 칼슘영양 향상을 위한 칼슘급원으로서 난각분의 효용성을 검토한 연구에 바탕하여 난각분을 첨가한 시판 라면의 칼슘영양 향상효과를 저칼슘식이를 투여받은 성장기 흰쥐를 이용하여 검토하였다. 실험은 3주령의 SD 쥐를 저칼슘식이로 2주간 사육 후 무작위로 5군으로 나누어 대조군으로 0.05$\%$ 저칼슘$CaCO_{3}$식이, 일반 라면식이 (칼슘수준0.08$\%$), 나머지 3군은 0.15$\%$ 칼슘 수준이 되도록 탄산칼슘, 탈지분유, 난각분 강화라면으로 조성한 식이와 탈 이온수를 임의 섭취로 4주간 투여하고 식이 섭취와 체중을 측정하였다. 마지막 3일 간의 변을 수거하였고, 희생하여 대퇴골과 경골을 추출하여 칼슘 이용효율을 측정하였다. 실험결과는 칼슘급원에 구별 없이 0.15$\%$ 칼슘군들이 0.05$\%$ 칼슘 공급군보다 체중, 경골, 대퇴골의 무게, 길이, 회분 및 칼슘함량에서 유의적으로 향상되었다. 겉보기 흡수율도 칼슘 공급원에 따른 차이는 없어 난각분이 탄산칼슘이나 탈지분유와 동일한 수준의 생체 이용성을 나타냄을 뒷받침하였다. 난각분 강화 라면군은 동일 칼슘수준의 탄산칼슘군보다는 뼈의 무게에서 나았으나 경골 무게는 탈지분유군보다는 뒤떨어졌다. 길이자람에서는 차이가 없었다. 뼈의 강도는 경골에서만 유의적으로 칼슘수준이 증가함에 따라 증가되었고,대퇴골에서는 수치상으로 칼슘수준이 증가함에 따라 증가되었다. 칼슘 급원에 따른 차이는 없었다. 본 연구결과는 난각분은 칼슘급원으로, 또 라면은 칼슘강화의 매개체로 칼슘이 아주 부족한 집단에서 활용될 수 있음을 시사한다. 단 라면의 생성공정에 이용되는 유지나 스프의 높은 나트륨 함량 등 건강식품으로는 제한점이 있는 만큼 이 를 개선하고 편의식품으로 일반인들의 섭취 빈도나 한국인의 칼슘섭취 수준을 감안하여 현 강화수준의 2배 정도로 높이고, 또 칼슘필요량이 높은 집단을 위하여 스프 등을 차별화 하는 방안을 고려해 볼 수 있겠다. 이와 아울러 소비자들이 영양표시를 활용하도록 영양교육을 확대하여 칼슘 충분섭취량(Al)이 높은 성장기, 폐경기여성, 노년층 인구집단의 칼슘영양 향상에 난각분 강화라면이 기여토록 할 수 있을 것이다.

• 치위생과학회지
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• 제22권3호
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• pp.191-198
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• 2022

Background: The purpose of this study was to evaluate the composition of the crystal phases of various calcium silicate-based materials (CSMs): ProRoot white MTA^Ⓡ (mineral trioxide aggregate) (WMTA), Ortho MTA^Ⓡ (OM), Endocem MTA^Ⓡ (EM), Retro MTA^Ⓡ (RM), Endocem Zr^Ⓡ (EN-Z), Biodentine^TM (BD), EZ-seal^TM (EZ), and OrthoMTA III (OM3). Methods: In a sample holder, 5 g of the powder sample was placed and the top surface of the material was packed flat using a sterilized glass slide. The prepared slides were mounted on an X-ray diffraction (XRD) instrument (D8 Advance; Bruker AXS GmbH, Germany). The X-ray beam 2θ angle range was set at 10~90° and scanned at 1.2° per minute. The Cu X-ray source set to operate at 40 kV and 40 mA in the continuous mode. The peaks in the diffraction pattern of each sample were analyzed using the software Diffrac (version 2.1). Then, the peaks were compared and matched with those of standard materials in the corresponding Powder Diffraction File (PDF-2, JCPDS International Center for Diffraction Data). A powder samples of the materials were analyzed using XRD and the peaks in diffraction pattern were compared to the Powder Diffraction File data. Results: Eight CSMs showed a similar diffraction pattern because their main component was calcium silicate. Eight CSMs showed similar diffraction peaks because calcium silicate was their main component. Two components were observed to have been added as radiopacifiers: bismuth oxide was detected in WMTA, OM, and EM while zirconium oxide was detected in RM, EN-Z, BD, EZ, and OM3. Unusual patterns were detected for the new material, OM3, which had strong peaks at low angles. Conclusion: It was caused by the presence of Brushite, which is believed to have resulted in crystal growth in a particular direction for a specific purpose.

• 한국수산과학회지
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• 제56권6호
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• pp.841-849
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• 2023

Corallina pilulifera (CP) is prevalent along the Korean coastline and belongs to the Corallinaceae family, exhibiting growth throughout all seasons. This study confirmed the role of calcium supplementation through CP, calcined CP (CCP), and a commercial calcium powder, highlighting variations in dosage within animal models induced by a calcium-deficient diet. Analysis of calcium absorption was conducted by assessing the serum and urine calcium levels during the feeding periods. Serum calcium content was significantly higher in the control group (CON, 9.79 mg/dL) than in the calcium-deficient model (CDM, 6.15 mg/dL). The calcium content of urine was significantly higher than that of CON (0.20 mg/dL) compared with CDM (0.08 mg/dL). Reticular bone thickness showed no significant differences between the CON and CDM groups. Additionally, micro-CT results demonstrated a reduction in the trabecular volume and a significant difference between the number of strands and the average interval of the reticular bone. In conclusion, CP serves as a promising source of calcium supplementation. Therefore, these findings emphasize that CP is of sufficient value as an industrial material related to calcium metabolism.

• 한국식품영양과학회지
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• 제16권1호
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• pp.18-21
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• 1987

마그네슘, 칼슘 및 인삼을 첨가하여 사육한 토끼의 혈청콜레스테롤 농도에 미치는 영향을 조사하여 다음과 같은 결론을 얻었다. 1. 인삼분말의 급여로 체중증가는 별차가 없었으며 간장의 무게는 상당한 증가를 나타냈다. 2. Total cholesterol은 인삼 4mg을 첨가한 실험군에서 가장 낮았고, 마그네슘과 칼슘이 1:2로 급여한 군에서 낮게 나타났다. 3. Free cholesterol과 cholesterol ester도total cholesterol의 경우와 같이 인삼 4mg을 첨가한 것과 마그네슘과 칼슘을 1:2로 급여한 실험군에서 가장 낮았다. 4. Total cholesterol이 가장 낮은 실험군에서 LDL이 가장 낮았으며, HDL/T-CHOL의 비는 가장 높게 나타났다. 5. Triglyceride와 phospholipid에 있어서는 인삼 첨가로 TG의 양은 점점 감소되었으나 PL의 경우는 상당히 증가되었다. 6. 전해질의 경우는 마그네슘과 칼슘을 1:2로 첨가하고 인상 4mg을 급여한 실험군의 $Na^+$이 120mEq/l, $K^+$이 6.8mEq/l를 보여 인삼이 전해질의 이동에 크게 작용하고 있는 것으로 생각된다. 이상과 같은 결과로 인삼은 토끼의 혈청 전해질의 분포상태와 콜레스테롤의 농도에 영향은 주며, 콜레스테롤 농도를 저하시키는 작용을 함과 동시에 지방질을 감소시키고 인지질은 증가시키는 작용을 하는 것으로 추정된다.

• 한국세라믹학회지
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• 제33권12호
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• pp.1347-1352
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• 1996

• 한국건설순환자원학회지
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• 제11권2호
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• pp.35-39
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• 2016

• 동아시아식생활학회지
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• 제23권6호
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• pp.713-722
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• 2013

The purpose of this study was to examine the effects of dietary green tea powder supplementation on bone metabolism in streptozotocin-induced diabetic rats. Thirty-two male Sprague-Dawley rats (body weight $210{\pm}3g$) were divided into two groups, diabetic and non-diabetic groups. Each group was randomly divided into two subgroups which were fed with the control and 1% green tea powder diets. The serum and urine concentrations of calcium and phosphorus were determined. Serum osteocalcin and ALP and urinary DPD crosslinks value were measured in order to monitor bone formation and resorption. Bone mineral density (BMD) and bone mineral content (BMC) were estimated using PIXImus in the spine and femur. Body weight gain and FER were lower in the diabetic group than in the non-diabetic group regardless of diets. The serum concentration of calcium and phosphorus were not changed among all groups. Urinary calcium and phosphorus excretion were higher in the diabetic group than in the non-diabetic group regardless of diets; however, they were not significantly different by green tea powder intake. Serum alkaline phosphatase (ALP) was increased in the diabetic group than in thenon-diabetic group. Further, there were no significant differences in serum osteocalcin and urinary deoxypyridinoline crosslinks value among all groups. The levels of spine and femur bone mineral density of the diabetic group were significantly lower than that of the non-diabetic group. Within the diabetic group, spine BMD was significantly higher in rats fed with the green tea powder diet than in rats fed the control diet. Therefore, this study suggests that green tea powder has a beneficial effect on bone health, although it is not directly applicable to humans.

• 한국분말재료학회지
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• 제26권6호
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• pp.493-501
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• 2019

In this work, ultra-fine calcium oxide (CaO) powder derived from eggshells is used as the starting material to synthesize mineral trioxide aggregate (MTA). The prepared CaO powder is confirmed to have an average particle size of 500 nm. MTAs are synthesized with three types of fine CaO-based powders, namely, tricalcium silicate (C3S), dicalcium silicate (C2S), and tricalcium aluminate (C3A). The synthesis behavior of C3S, C2S and C3A with ultra-fine CaO powder and the effects of C₃A content and curing time on the properties of MTA are investigated. The characteristics of the synthesized MTA powders are examined by X-ray diffraction (XRD), field emission-scanning electron microscope (FE-SEM), and a universal testing machine (UTM). The microstructure and compressive strength characteristics of the synthesized MTA powders are strongly dependent on the C3A wt.% and curing time. Furthermore, MTA with 5 wt.% C3A is found to increase the compressive strength and shorten the curing time.

• 한국지반신소재학회논문집
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• 제14권2호
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• pp.1-9
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• 2015

본 연구에서는 미생물 반응으로 생성된 탄산칼슘을 분말로 제작하여 연약지반(모래)의 강도 증진 효과를 확인하고자 하였다. 미생물반응으로 생성된 탄산칼슘의 고결화 효과를 분석하기 위해 6가지 case(무처리, 탄산칼슘, 시멘트, 탄산칼슘+시멘트(1:9, 3:7, 5:5))를 모래 중량비에 따라 고결제를 달리(4%, 8%)하여 양생후(7일, 28일) 실험을 하였다. 또한 현장여건과 비슷한 조건의 실험을 하기 위해서 중량비에 따라 세립분(0%, 5%, 15%)를 추가하여 $D5cm{\times}H10cm$ 공시체로 성형한 후 일축압축강도를 측정하였다. 그 결과, 중량비와 양생일이 증가할수록 탄산칼슘, 시멘트, 탄산칼슘+시멘트 모두 강도가 증가하는 경향을 확인하였다. 또한 시멘트 강도 대비 중량비 1:9, 3:7, 5:5의 탄산칼슘+시멘트 강도를 비교한 결과 각각 93.5~95.8%, 82.5%, 65.2~70.6%로 나타났다.

• 한국수산과학회지
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• 제48권2호
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• pp.168-177
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• 2015

Shell waste from the butter clam Saxidomus purpuratus and littleneck clam Ruditapes philippinarum is a large by-product of shellfish aquaculture, and it is desirable to convert it into value-added products for industrial applications. In this study, calcium carbonate (CaC) polymorphs from butter clam (BCSP) and littleneck clam (LCSP) shell powders and commercial CaC were characterized using Fourier transmission infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results revealed that the optimal calcination conditions to eliminate organic substances and improve solubility for both BCSP and LCSP were $800^{\circ}C$ for 8 h in an electrical furnace. Calcination improved the white index of the butter clam (BCCP) and littleneck clam (LCCP) calcined powder compared with shell powders. The calcium content in BCCP (51.1%) was higher than that of LCCP (44.9%) or commercial calcium oxide (CaO, 44.7%). The XRD patterns of BCCP and LCCP were similar to that of CaO. Cubic-like crystals of CaC and irregular crystals of BCCP and LCCP were observed by SEM. The FT-IR and XRD analyses revealed the presence of calcite and aragonite in the BCSP and aragonite in the LCSP, whereas the CaC contained calcite. These results indicate that butter and littleneck clam shells are potential biomass resources for calcium carbonate and calcium oxide.